76 winters, day by day
Roundhill Ski Field, New Zealand. Every ski winter from 1950 to 2025.
Roundhill Ski Field, New Zealand. Every ski winter from 1950 to 2025.
Every day of every winter
Each row is a winter, oldest at the top. Each column is a day, from the start of the season to the end. The darker the blue, the more snow fell that day.
Loading the daily snowfall…
Climate change
Average winter temperature at the summit
Faster warming than 18% of 736 resorts
+1.6°C+2.8°F
The trend: from -6°C20°F to -5°C23°F. Point at a winter to read it.
Snowfall at the summit
+33%
The trend: from 1.7 m66 in to 2.2 m87 in. Point at a winter to read it.
Powder days at the summit
+2 days
The trend: from 3 to 4. Point at a winter to read it.
Days with a base at the summit
−17 days
The trend: from 77 to 60. Point at a winter to read it.
Days with fresh snow at the summit
+3 days
The trend: from 38 to 41. Point at a winter to read it.
Each dot is one winter. The curve is a running average over about ten winters; the dotted line is the straight trend through all of them, and the changes above are measured along it. One winter is weather; the trend is climate.
Then and now
Then 1950–1979Now 1996–2025
- Snowfall at the summit+12%
Then
1.8 m70 in
Now
2.0 m78 in
- Snowfall in the village+11%
Then
1.8 m71 in
Now
2.0 m78 in
- Powder days at the summit+1 day
Then
3
Now
4
- Days with a base at the summit−10 days
Then
72
Now
62
- Average temperature at the summit+0.9°C+1.6°F
Then
-6°C21°F
Now
-5°C23°F
Averages per winter over the first and last 30 winters. A powder day brings 10 cm4 in or more of new snow; a base is 30 cm12 in or more on the ground.
Records
All winters
- 1950s19501.0 m39 in195182 cm32 in19521.2 m46 in19531.6 m61 in19541.7 m67 in19551.6 m63 in19561.4 m54 in19571.7 m67 in19581.3 m51 in19591.3 m50 in
- 1960s19601.7 m65 in19611.8 m72 in19621.5 m57 in19632.4 m93 in19641.7 m68 in19652.0 m78 in19661.3 m52 in19671.1 m44 in19682.9 m115 in19691.1 m45 in
- 1970s19702.2 m88 in19712.1 m82 in19722.0 m80 in19731.8 m70 in19742.5 m97 in19752.3 m92 in19762.2 m85 in19772.3 m89 in19782.9 m115 in19791.9 m76 in
- 1980s19802.1 m82 in19812.0 m80 in19822.0 m78 in19832.7 m105 in19841.5 m60 in19851.8 m71 in19863.2 m126 in19871.5 m58 in19882.1 m84 in19891.3 m51 in
- 1990s19901.6 m64 in19912.1 m82 in19923.4 m132 in19931.8 m69 in19942.6 m103 in19953.2 m127 in19961.9 m75 in19971.6 m62 in19981.9 m75 in19991.7 m66 in
- 2000s20002.5 m98 in20011.3 m51 in20021.8 m72 in20032.7 m104 in20042.2 m87 in200587 cm34 in20062.4 m93 in20072.0 m80 in20082.7 m106 in20091.9 m74 in
- 2010s20102.2 m87 in20112.0 m77 in20122.7 m106 in20132.4 m94 in20141.2 m47 in20152.1 m83 in20161.7 m66 in20172.5 m99 in20181.3 m51 in20191.6 m63 in
- 2020s20201.5 m58 in20211.8 m71 in20222.9 m114 in20231.6 m62 in20242.4 m96 in20252.4 m94 in
Modelled weather from ERA5 and ERA5-Land, not measured on the slopes. Snow depth is the average over a grid cell about 9 km wide, so it can differ a lot from what the piste report says. How SnowOdds works